Make content_browsertests support restarts across a test.

content/public/test/test_launcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/public/test/test_launcher.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 422 matching lines @@
 
   for (CommandLine::SwitchMap::const_iterator iter = switches.begin();
        iter != switches.end(); ++iter) {
     new_cmd_line.AppendSwitchNative((*iter).first, (*iter).second);
   }
 
   // Do not let the child ignore failures.  We need to propagate the
   // failure status back to the parent.
   new_cmd_line.AppendSwitch(base::TestSuite::kStrictFailureHandling);
 
-  if (!launcher_delegate->AdjustChildProcessCommandLine(&new_cmd_line))
+  ScopedTempDir temp_dir;
+  // Create a new data dir and pass it to the child.
+  if (!temp_dir.CreateUniqueTempDir() || !temp_dir.IsValid()) {
+    LOG(ERROR) << "Error creating temp data directory";
     return -1;
+  }
+
+  if (!launcher_delegate->AdjustChildProcessCommandLine(&new_cmd_line,
+                                                        temp_dir.path())) {
+    return -1;
+  }
 
   return RunTestInternal(
       test_case, test_name, &new_cmd_line, default_timeout, was_timeout);
 }
 
 bool RunTests(TestLauncherDelegate* launcher_delegate,
               bool should_shard,
               int total_shards,
               int shard_index) {
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
@@ skipping 273 matching lines @@
       cycles--;
   }
   return exit_code;
 }
 
 TestLauncherDelegate* GetCurrentTestLauncherDelegate() {
   return g_launcher_delegate;
 }
 
 }  // namespace test_launcher